Question 794107
Simplifying:
{{{6x+(x-3)+(3x+7)=180}}}-->{{{6x+x-3+3x+7=180}}}-->{{{6x+x+3x+7-3=180}}}-->{{{10x+4=180}}}
because parentheses following a "+" sign do not change the meaning of an expression.
Solving:
{{{10x+4=180}}}-->{{{10x+4-4=180-4}}}-->{{{10x=180-4}}}-->{{{10x=176}}}-->{{{10x/10=176/10}}}-->{{{x=176/10}}}-->{{{highlight(x=17.6)}}} or {{{highlight(x=88/5)}}}