From 87a3518cf8739366fe61ae69743c52b0b0667e82 Mon Sep 17 00:00:00 2001
From: embeddedt <42941056+embeddedt@users.noreply.github.com>
Date: Tue, 2 Apr 2019 16:52:33 -0400
Subject: [PATCH] Add basic math operations to equations.js

---
 src/equations.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/equations.js b/src/equations.js
index cddcac9..a49184c 100644
--- a/src/equations.js
+++ b/src/equations.js
@@ -326,4 +326,20 @@ Equation.prototype._isCubic = function(variable) {
     return this._maxDegree() === 3 && this._onlyHasVariable(variable);
 };
 
+Equation.prototype.subtract = function(val, simplify) {
+    return new Equation(this.lhs.subtract(val, simplify), this.rhs.subtract(val, simplify));
+};
+
+Equation.prototype.add = function(val, simplify) {
+    return new Equation(this.lhs.add(val, simplify), this.rhs.add(val, simplify));
+};
+
+Equation.prototype.multiply = function(val, simplify) {
+    return new Equation(this.lhs.multiply(val, simplify), this.rhs.multiply(val, simplify));
+};
+
+Equation.prototype.divide = function(val, simplify) {
+    return new Equation(this.lhs.divide(val, simplify), this.rhs.divide(val, simplify));
+};
+
 module.exports = Equation;